Development of a statistical model for metal-humic interactions

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Analytical Chemistry (Washington); (United States)

DOI:https://doi.org/10.1021/ac00212a005· OSTI ID:5467197

Susetyo, W; Dobbs, J C; Carreira, L A ^[1]; Azarraga, L V; Grimm, D M ^[2]

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1. Univ. of Georgia, Athens (USA)
2. Environmental Protection Agency, Athens, GA (USA)

A statistical model for describing the distribution of binding sites in humic substances was developed. The model was applied to study the spectral titration plot generated by the lanthanide ion probe spectroscopy (LIPS) technique. This titration plot is used as a basis for studying the interactions between metal ions and humic binding sites. Humic samples were titrated with Eu{sup 3+}, which acts as the fluorescent probe ion. The competition effects between a proton, a metal ion other than the probe ion, and the probe ion itself in binding with the humic binding sites, as well as the electrostatic effects, are successfully predicted and described by the model.

• OSTI ID: 5467197
• Journal Information: Analytical Chemistry (Washington); (United States), Journal Name: Analytical Chemistry (Washington); (United States) Vol. 62:13; ISSN 0003-2700; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540210* -- Environment
Terrestrial-- Basic Studies-- (1990-)
540310 -- Environment
Aquatic-- Basic Studies-- (1990-)
CALCULATION METHODS
CHEMICAL REACTIONS
ELEMENTS
EUROPIUM
HUMIC ACIDS
ION PROBES
MATHEMATICAL MODELS
METALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
PROBES
RARE EARTHS
SPECTROSCOPY
STATISTICAL MODELS